Common use of Notice of Rights Clause in Contracts

Notice of Rights. Pursuant to the Right of First Refusal and Co-Sale Agreement, dated as of December 16, 2016 (the “Agreement”), this notice is to inform you of your Right of First Refusal and your Right of Co-Sale (each as defined in the Agreement) with respect to the Offered Shares. If you choose to do so, you may exercise one (but not both) of these rights with respect to the Offered Shares by returning this notice to the address below, with a copy to Blockstack Inc. If you decline your right to do so, you do not need to return anything. Your failure to return this notice on a timely basis will indicate that you have declined to exercise your Right of First Refusal and Right of Co-Sale with respect to the Offered Shares. Description of Transfer

Notice of Rights. Pursuant to the Right of First Refusal and Co-Sale Agreement, dated as of December 16, 2016 (the “Agreement”), this notice is I write to inform you of your Right of First Refusal and your Right of Co-Sale (each as defined in the Agreement) with respect to the Offered Shares. If you choose to do so, you may exercise one (but not both) of these rights with respect to the Offered Shares by returning this notice to me, at the address below, with a copy to Blockstack JUNO THERAPEUTICS, Inc. If you decline your right to do so, you do not need to return anything. Your failure to return this notice on a timely basis will indicate that you have declined to exercise your Right of First Refusal and Right of Co-Sale with respect to the Offered Shares. Description of Transfer.

Notice of Rights. Pursuant to the Right of First Refusal and Co-Sale Agreement, dated as of December 16November [__], 2016 2007 (the “Agreement”), this notice is I write to inform you of your Right of First Refusal and your Right of Co-Sale (each as defined in the Agreement) with respect to the Offered Shares. If you choose to do so, you may exercise one (but not both) of these rights with respect to the Offered Shares by returning this notice to me, at the address below, with a copy to Blockstack Anza Therapeutics, Inc. If you decline your right to do so, you do not need to return anything. Your failure to return this notice on a timely basis will indicate that you have declined to exercise your Right of First Refusal and Right of Co-Sale with respect to the Offered Shares. Description of Transfer.

Notice of Rights. Pursuant to the Amended and Restated Right of First Refusal and Co-Sale Agreement, dated as of December 1620, 2016 2013 (the “Agreement”), this notice is I write to inform you of your Right of First Refusal and your Right of Co-Sale (each as defined in the Agreement) with respect to the Offered Shares. If you choose to do so, you may exercise one (but not both) of these rights with respect to the Offered Shares by returning this notice to me, at the address below, with a copy to Blockstack Upland Software, Inc. If you decline your right to do so, you do not need to return anything. Your failure to return this notice on a timely basis will indicate that you have declined to exercise your Right of First Refusal and Right of Co-Sale with respect to the Offered Shares. Description of Transfer.